If for some reason you add a recipe that is already on their site, they will put this big red alert on your recipe that says you are a copyright violator!!! (Or in my case, I added a recipe that was not on their site, and then they added the same recipe after I did, so I became a copyright violator. Whatever.) I adjusted my recipe to my taste (using lower fat ingredients) and the message went away.
They also give you a table of equivalents, which is pretty handy.